Lower unit swap/ PICS

[redogman67]

Ok so I am attempting to put the lower unit from a 1970 Johnson 20 hp onto my current motor which is a 1974 Evinrude 25 hp. I have never done this and am seeking some guidance. I have pictures on my photo bucket because I can't post them here. They are of the 20 hp Johnson's lower unit. Here is the list of my questions :

When I take the lower unit off here there is no gasket I have to replace right?

On the closeup pictures, do they look normal? and what is that black thing that is kind of curled up inside that tube? Is this the tube that water comes out of?

The pic with the drive shaft end: Is there nothing that secures this to the motor? Does it just slide up on my new motor without having to connect any thing other than the shift linkage?

I don't think I am going to replace the impeller right now because I want to ensure that this lower unit works before adding new parts to it. So if it looks ok than I will prob just attempt the swap and if I need to add a new impeller later I will do so. Any extra input is welcomed and appreciated. I am assuming I can just put this lower unit on my Evinrude in the reverse order in which I took it off correct?

Here is the link : http://s574.photobucket.com/albums/ss186/dkman67/

 

[jasper60103]

Re: Lower unit swap/ PICS

When I take the lower unit off here there is no gasket I have to replace right?

Correct

On the closeup pictures, do they look normal?

You should clean up the drive shaft. Looks cruddie. Also, it should have an o-ring that fits in a groove below the splines.

and what is that black thing that is kind of curled up inside that tube?

Water tube grommet

Is this the tube that water comes out of? Yes

 

[AEROCOOK]

Re: Lower unit swap/ PICS

No gasket to replace.
Black thing is the water tube seal, looks kind of deformed, I would replace if it were mine, use a little vaseline on the tube and seal to help it slide in easy.
Driveshaft just slides up into the motor, dont know about interchangability, compare splines and everything else for that matter before attempting install.
It's a simple job, just dont force any thing, if everything is lined up properly like the water tube into the pump housing and the drive shaft splines into the bottom of the motor, it will push up to the housing quite easily.
Then do it all over again when you buy the new impellor.
And DO buy a NEW impellor regardless of what the current one looks like.